<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Insert title here</title>
	<style type="text/css">
		h2:before{
			content: 'COLUMN';
			color: white;
			background-color: orange;
			font-family: 'Comic Sans MS', Helvetica, sans-serif;
			padding: 1px 5px;
			margin-right: 10px;
		}
		
		h2.sample:before{
			content: none
		}
	
	</style>
</head>
<body>
	<h2>biaoti wenzi</h2>
	<h2 class="sample">sample</h2>
</body>
</html>